Windows系统文件扩展名

NBK Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) NBM NetBeans Module (Sun) NC Graphics File

NC Mastercam NC Programs (CNC Software， Inc.) NC neatComponents

NC Numerical Control Machine Instructions NC Preprosessed GOC Source NC Unidata netCDF Graphics

NC Geopath Machine Part File (SolutionWare Corporation) NC X-editor Program for CNC Machines (X-net ApS) 编辑本段O 对象代码库文件 O Object File

O UNIX/GCC Object File

O Origin C Compiled Program File (OriginLab)

O Free Pascal Object FIle for Linux or DOS Version (FPC Development Team) O$$ Output File O$$ Sprint Outfile

O01 Typhoon Voice File

O1 Free Pascal Object File for GO321v1 Platform (FPC Development Team) O2C Objects to See 3D File Format (mb Software AG) O3 Ozone Messenger Program Support Files O8O Mediator5 Repositorytabs Vorlagen.006 File OAB Outlook Address Book (Microsoft) OAF ETH Oberon Applet File OAF Outrage Animation Rows

OAF Flight Simulator Texture File (Microsoft) OAZ NetFax Manager OAZ Fax File OB IMB LinkWay Object File

OB ABF Outlook Backup Backup File (ABF software， Inc.) OB$ Compressed OBJ (Microsoft)

OB1 OzWin CompuServe E-mail/Forum Access Saved Outbox File

OBA Timespace X100 Digital Video Recorder Video File (Electronics Services Agency) OCA OLE Custom Control Library Information OCA Visual Basic Control Typelib Cache

OCB Origin Precompiled Origin C File (OriginLab Corporation) OCC DB/TextWorks Database Terms and Words OCC OptControlCentre Model File

OCD OCAD Digitized Map (Steinegger Software) OCE Brio Query (Hyperion Solutions Corporation) OCF Object Craft File OCF OM2Cipher File

OCM AOL Advertising Control File (America Online， Inc.) OCM Internet Odyssey 2 Update

OCM Netscape Communicator Aim File

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OCP Advanced Art Studio

OCP Offline Commander Project File OCR FAXGrapper FAX Text File

OCS eDoc DigiSign Digitally Signed Document (Fujitsu Denmark) OCT Octalizer Musical File OCT Radiance Octree Format

OCX Object Linking and Embedding (OLE) Control Extension (Microsoft) OC_ Doko Compressed Install File OD1 Omnis5 Database File OD2 Omnis5 Database File OD3 Omnis5 Database File OD4 Omnis5 Database File OD5 Omnis5 Database File OD6 Omnis5 Database File OD7 Omnis5 Database File OD8 Omnis5 Database File OD9 Omnis5 Database File

ODA CALS Group IV Type 2 Raster Image ODA ODA Document ODA Used with OCX

ODA AIBO Audio Voice (Sony)

ODB ArcView Object Database ASCII File (ESRI)

ODB Psion Organiser Datafile and LZ Diary File (Psion PLC)

ODB OpenOffice/StarOffice OpenDocument (Ver 2) Database (Sun Microsystems， Inc.) ODB ABAQUS File (ABAQUS， Inc.)

ODB Organizers Database (ODB) Database (Organizers' Collaborative) ODC Office Data Connection

ODC OpenOffice/StarOffice OpenDocument (Ver 2) Chart (Sun Microsystems， Inc.) ODCCUBEFILE Office Data Connection

ODCDATABASEFILE Office Data Connection ODCNEWFILE Office Data Connection ODCTABLEFILE Office Data Connection

ODE Office Object Data Embedding File (Microsoft) ODF BattleZone Cartographers Guild File ODF OnkoS Data (OnkoS)

ODF Open Document Interchange (ODIF)

ODF Star Trek Armada Ship/Structure Infomation

ODF OpenOffice/StarOffice OpenDocument (Ver 2) Formula (Sun Microsystems， Inc.) ODG OpenOffice/StarOffice OpenDocument (Ver 2) Graphics Document (Sun Microsystems， Inc.)

ODH Odigo History File (Comverse， Inc. a part of Comverse Technology)

ODI OpenOffice/StarOffice OpenDocument (Ver 2) Image (Sun Microsystems， Inc.) ODIF Open Document Interchange Format ODL Object Definition Language

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ODL Visual C++Type Library Source (Interface Definition Language File) (Microsoft) ODM Opendisc Software (Opendisc)

ODM OpenOffice/StarOffice OpenDocument (Ver 2) Global Text Document (Sun Microsystems， Inc.) ODP Oedipus

ODP OpenOffice/StarOffice OpenDocument (Ver 2) Presentation (Sun Microsystems， Inc.) ODS NCompass Labs Internet Script

ODS Outlook Express Mailbox (Microsoft) OFM Font (Adobe)

OFM OmniForm Form File

OFM PostScript Font Description File

OFM OfficeForms Blank Form File (Toplevel Computing) OFN Office FileNew File (Microsoft)

OFR OptimFROG Encoded Audio (Florin Ghido) OFT Outlook Item Template (Microsoft) OFX Olicom Fax

OFX Open Financial Exchange File OGF OnkoS Graphic File (OnkoS) OGF Outrage Graphic Rows

OGG Ogg Vorbis Codec Compressed WAV File OGG Origin Graphic File (OriginLab) OGG Salt Lake City Game File OGL Overlay Source Code

OGM Ogg Vorbis Compressed Video File OGM Origin Matrix File (OriginLab)

OGO OriginPro Graphic Object File (OriginLab) OGS Origin Script File (OriginLab)

OGW Origin Worksheet File (OriginLab)

OGX C++ Component Gallery Exported Classes and Resources (Borland Software Corporation)

OH Overhoor ( DrillAssistant) List (Efkasoft) OH4 Overhoor ( DrillAssistant) List (Efkasoft)

OHC OpenHelp Table of Contents File (Borland Software Corporation) OHI OpenHelp Index (Borland Software Corporation) OHL OpenHelp Link (Borland Software Corporation) OHP DOS 7 File

OHP OpenHelp Project File (Borland Software Corporation) OHS Bink Outbound History

OHW Overhoor ( DrillAssistant) List (Efkasoft) OID Prosa/OM Object Interaction Diagram

OIF QuickBase Web-sharable Database Interchange File OIK Lenné3D Plant Distribution File (Lenné3D GmbH i.G.) OIL Open Image Library Format OIX Lenné3D Plant Distribution File (Lenné3D GmbH i.G.)

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OJP 3WayPack (The Three-Mode Company) OKS OKScript File (Mike Mardesich) OKT Oktalyzer Tracker Module

OKX OKScript File (Mike Mardesich) OLB AUTOGEN

OLB Automation Object Library (Microsoft Corporation) OLB PSpice Capture Symbols Models (OrCAD) OLB VAX Object Library

OLB Medical Terminology Challenge Data File (Delmar Learning) OLD Old Version

OLE Object Linking and Embedding (OLE) Object OLF OyezForms Legal Documents (UK) (Oyez) OLI Olivetti Text File

OLK MS Mail Mailbag Lock

OLK Outlook Address Book (Microsoft) OLL TrialDirector Object Load List

OLN Visual C++ Outline Examples (Microsoft) OLT Visual C++ Outline Examples (Microsoft)

OLV OnLive! Traveler Sound File (The Digital Space Commons) OLV OyezForms Legal Documents (UK) (Oyez) OM Omicron Compiler File

OMA Sony Music Format File (Sony) OMD Prosa/OM Class Model OMF Open Media Format File OMG OpenMG Jukebox (Sony)

OMN Omnipotent， Inc. Collection File OMO Oracle Media Objects File OMS Briggs Softworks Order Maven OMS Macintosh MP3 Music Format

OMS Omega Downloader Configuration File

OMX OMAX Make Tool Path File (OMAX Corporation) OMX Ots Media Library (Ots Labs Pty Ltd)

ON Audio Utility Tuningwrench Compressed File OND Notes Database (IBM)

ONE docPointer Visual ReadMe File (docPointer) ONE OneNote Note File (Microsoft)

ONE EdgeCAM Licensing Data Ffile (Pathtrace Engineering Systems) ONF Open Navigation Format File ONX Onyx Graphics Postershop File

OO Free Pascal Object File for OS/2 Version (FPC Development Team) OOM Shroom Swap File

OOP OOP Packer Archive (TonyTown Software Ltd.) OP Rescue Disk File

OP Origin Preprocessed Origin C File (OriginLab Corporation)

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